Sometimes when visiting a web site, I want to see some detail in a small image on the page. Safari's function to increase font size does nothing to increase the size of images. Also, highlighting the image in Safari and attempting to copy the image to the clipboard to use Preview's "New from Clipboard" command does not work.

However, I found that if you drag the image off the page in Safari and drop it onto Preview's icon in the Dock, Preview will launch (if not already open, in which case Preview will switch to the foreground application) and display the image. You can then use the Zoom commands to increase the image size to something viewable. There is a fair amount of pixellation in the enlarged image, but with many graphics, this process works well enough to make out details that are otherwise lost on the web page.

[robg adds: You can also use Universal Access' Zoom function, as described in this hint from long ago. This drag-and-drop method doesn't work in Camino or Firefox.]

It's always cool to find new, cross-app drag and drop tips, but for this kind of thing I take advantage of Universal Access' Zoom feature. Once enabled and the default range set in Zoom's Options, hitting option-command and the plus or minus keys zoom in and out respectively. Screen smoothing can be toggled with option-command \.